Compilare: main.cpp: In function 'void dijk(int)': main.cpp:25:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[top].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:45:15: warning: unused variable 'j' [-Wunused-variable] int m,n,i,j,x,y; ^